Magneto



April 23, 1935. w. F. BDRGERD 1-? AL MAGNETO Filed Dec. 1, 1933 4 Sheets-Sheet 1 @ar ZMfM/ i 29- A ril 23, 1935. w. F. BORGERD AL MAGNETO Filed Dec. 1, 1935 4 sheet -Sheet 2 April 23,1935. BQ E'R-D HA 1,999,030

MAGNETO Filed Dec. 1, 1955 4 Sheets-sheet 3 ,-.Batented Apr.. 1938 PATENT OFFICE morzaro UNITED STATES William I.

Bergerd, Riverside, and Charles a;

erek, Chicago, 111., alignors to International Ilarvuter Jersey a corporation of New mm'mw 1, 19:3, Serial No. 100,536 i (c1. I'lla) the reduction of cost of manufacture.

The above objects, and others which will be clear to those skilled in the art after a study of the specification and drawings, are accomplished by a construction embodying certain novel features.

In the drawings:

Figure 1 is a vertical, longitudinal, center cross section of a magneto embodied in the invention;

Figure 2 iso section taken on the line 2-2 of Figure 1;

Figure 3 is a section taken on the line 3-3 of Figure 1;

, Figures 4 to 8, inclusive, show, the same elements in cross section as are in Figure 1 with the diflerent unitary components of the complete magneto tion;

Figure 9 is a top plan view of the magneto shownin section in Figure 1; and,

Figure 10 is a side elevation of the magneto shown in Figure 1.

The magneto as illustrated is mounted on an integral frame II] which in itself forms the base and a portion of the rotor housing of the magneto. This frame is preferably formed as a die casting. The material used for die casting work, being non-magnetic, is particularly adapted for use in magnetos where the magnetic fields must be confined to certain well defined paths forgreatest efilciency. The frame III. has. a flat base for mounting on a supporting bracket. It is open at one end for insertion of the rotor to be hereinafter described. A longitudinal bore formed throughthe center of the base of the frame is of a diameter sufilcient to accommodate the rotor I l.

The rotor i I is formed with a shaft 12 mounted a in a ball bearing assembly I! at the closed end of the frame bore which accommodates it. The projecting end of the shaft is formed to receive .an impulse coupling or other form of driving means. Adjacent one end of the shaft'within removed betterto show the construethe frame structure, arcuate, laminated pole pieces it are mounted by being cast in position with a die casting metal which surrounds the pole pieces except at their peripheral edges and a portion or their awesomeness, at

metrically opposite positions substantially more than "degrees" each, leaving angular spaces between their-ends; llspaced axially from the pole pieces il a second set of pole pieces II are similarly mounted on" the shaft If. These pole pieces are mounted angularly ll degrees around. the

shaft i! from the pole'pieces it. A substantial axial distance is provided between thepole'pieces l4 and ii to prevent magnetic fields extending position by means to be hereinafter described.

Vertically above the center of the rotor, two axially spaced pole pieces I! are embedded in the frame III, being formed adjacent the rotor with arcuate surfaces in operating clearance with respect to the surface of the rotor. It will be noted that the pole pieces I! are extended axially equivalent to the width of the pole pieces I4 and II carried by the rotor.

Above the. frame In the pole pieces is extendyertically upwardly, forming poles between which the induction coil 20 is mounted. This coil is of a conventional type formed with a laminated core Ziwhich contacts with the pole pieces IO, and with primary windings 22 and secondary windings 23. The core 2| is held securely in position between the pole pieces l9 by any suitable means. A casing 24 of bakelite or similar material completely encloses the coil. Lugs 28 formed on the casing straddle one of the pole pieces ll, holding the frame the coil in position. I

At the open end of the bore formed in Ill, a casting 2| is formed with a fiange mating with a flange formed around the open end of the frame II. The casting 20 is provided with a support 21 for a ball bearing assembly 28, which supports the rotorshaft 12 at that end. The casing 26 also forms a support for a breaker cup 29, which houses the breaker mechanism conventionally used on msgnetos'ofthis type. A cover plate It fitted over thecastingfl providee'access to the breaker for adjustment or 'repair.

- A horizontal seating fiangeji is formed around 20 iii below the pole pieces it, provide stops for the V ends of the magnet II. The magnet is held in the top of the frame i0. On this flange a coil housing 32 is seated, being secured thereon by cap screws 33 and 33'. This housing covers not only the coil 20, but extends forwardly therefrom enclosing other parts, as will be hereinafter described.

The magnet I I previously referred to fits about the housing 32 with clearance and is held in its position thereon by a strap 34 extending over the top of the magnet and secured at each side thereof to the housing 32, as best shown in Figures 9 and 10.

In addition to the seating flange 3| formed on the frame 16, a seat 35 is formed transversely across the front, forwardly of the coil 26. A support 36 mounted on this seat and extending thereabove forms a means for mounting the distributor shaft 31. It will be noted that, above the seat 35, a shim or gasket 38 has been indicated. The cap screws 39, which secure the support 36 on the seat 35, provide means, together with the gasket 38, to adjust the vertical position of the distributor shaft for a purpose to be hereinafter described.

The distributor shaft 31 carries rigidly mounted thereon a gear 40 and a. distributor disk 4|. The gear 40 meshes with a driving gear 42 rigidly mounted on the shaft l2. In production methods, it has been found diflicult to maintain accuracy within limits sufiicient to properly mesh gears such as the gears 43 and 42 of this magneto. By the provision of a seat, as indicated at 35, and by the use of laminated shims, the desired gear relationship may be obtained after the manufacturing processes are complete. This is a particular feature of this invention, which has great utility in making possible the manufacture of magnetos having long life and quiet operation.

The distributor disk 4|, which may be of any conventional construction, carries the usual contact means for engaging the brushes 43 carried by the distributor head or cover 44. Said cover seats against the open end of the housing 32 and against a seat formed at the top of the casting 26, being held securely in position by resilient straps 44' hooked over notches formed in the housing 32 and held therein by the magnet, as shown in Figures 9 and 10.

The center brush 45 carries the high tension current for distribution to the brushes 43. Bosses 46 are indicated, into which terminals are inserted for delivering current to the spark plugs of an engine. At the upper part of the distributor head, a coiled wire 41 contacts with the high tension lead 48, which is carried in an insulating support 49. The lead 43 extends over into contact with a high tension terminal 50 from the secondary winding of the coil 20. To provide a safety against damage due to high voltages on open circuits, a jump gap is formed by a conductor 5| extending from the support 49 into proper clearance relation with respect to the metallic support 36 or other conveniently located metal of the adjacent structure. The bushing 49 is mounted on an extension 52 of the support 33, as shown in Figure '7.

A condenser 53 is connected by a conductor 54 with the coil 20 and by a conductor 55with a terminal 56 which extends into the breaker cup. Itwill be noted that the conductor 55 is carried down under the gear 42, being protected from said gear by a sheet metal insert 51 hooked under projections 58 formed on the frame ID.

The operation of a magneto as above described is identical with any conventional magneto.

However, it is in the construction of the parts and in the assembly thereof that the novelty of the present invention resides. It will be noted that the frame It carries the pole pieces for the magnet and the pole pieces for the coil. Said frame also supports one end of the rotor, the other end being supported by the casting 26, which also forms a support for the breaker cup with its associated mechanism. It will be seen then that there are three major parts in so far as the base and'rotor of the magneto are concerned. The coil 23 is carried at the upper extension of the pole pieces [9, requiring no additional support. The housing 32 completely encloses all of the upper portion of the magneto with the exception of the forward end, which is enclosed by the distributor head 44. The housing 32 also forms a means for securing the magnet ll in position. The die casting operation 4 gives, without machining, the seating flange 3| on which the housing 32, also of die casting material, is seated. The flange at the forward side of the housing 32 is also satisfactory, without any finishing operation, for a tight seal of the gasket carried by the distributor head 44. The casting 26, which may be made of iron or die cast metal of any suitable composition, requires finishing at the top where the distributor head or cover 44 seats. By a construction as illustrated and described, very little machining or fitting operation is required to provide the absolute dusttight enclosure required for the working-mechanism of a magneto.

Another principal feature of construction, which is obtained by" a novel and simple construction, is themounting of the distributor shaft 4| in the support 36. When die-casting the frame ll, the seat 35 is formed thereon in dies. The support 36 is mounted without any machining operation on said seat, the shims 33 being provided to adjust the distributor gear 43 with relationship to the driving gear 42 for proper alignment, to give quietness and long life.

I It is to be understood that applicants have shown and described only a preferred form of their improved inductor type magneto construction and that they claim as their invention all modifications thereof falling within the scope of the appended claims.

What is claimed is:

1. In an inductor magneto and in combination, a frame casting forward to receive a rotor and rotatably supporting one end of the rotor, a cover member fitted to said casting and supporting the other end of the rotor, an inductor coil mounted on the frame casting, said casting being of non-magnetic material and containing embedded therein pole pieces of magnetic material, a housing open at one end and at the bottom, said housing being fitted over the frame casting, a U-shaped magnet fitted over the housing and engaging the pole pieces embedded in the frame casting, a distributor support mounted on the frame casting, a distributor rotatably mounted on said support, and a distributor cover mounted it; completely enclose the open end of the hous- 8. 2. In an inductor magneto andin combination, a frame casting formed to receive a rotor and rotatably supporting one end of the rotor, a cover member fitted to said casting and supporting the other end of the rotor, an inductor coil mounted on the frame casting, said casting being of non-magnetic material and containing embedded therein pole pieces of magnetic manoma'oeo ing and engagingthe pole pieces embedded inthe frame casting, a strap engaging the top of said magnet and secured to the housing, a distributor support mounted on the frame casting, a distributor rotatably mounted on said support, and

- closing the inductor coil, a U-shaped magnet a distributor cover mounted to completely enclose the open end of the housing.

3. In an inductor magneto and in combination, a frame casting formed of non-magnetic material to receive arotor and rotatably supporting one end of the rotor, a cover member fitted to said casting and supporting the other end of the rotor, an inductor coil mounted on the frame casting, pole pieces of magnetic material extending laterally through the frame casting, a housing open at one end and at the bottom, said housing being fitted over the frame casting enfitted over the housing and engaging the pole pieces embedded in the frame casting, adistributor support mounted on the frame casting within the housing, ,a distributor rotatably mounted on said support, and a distributor cover mounted to completely enclose the open end of the housing.

4. In an inductor'magneto and in combination, a frame casting formed of non-magnetic material to receive a rotor and rotatably-supporting one end of the rotor, a cover member fitted to, said casting and supporting the other end of the rotor, an inductor coil mounted on the frame casting, pole pieces of magnetic material extending laterally through the frame castingfa housing open at one end and at the bottom, said housing be-' ing fitted over the frame casting enclosing the inductor coil, a U-shaped magnet fitted over the housing and engaging the pole pieces embedded in the frame casting, a distributor support mounted on the frame casting within the housing, a distributor rotatably mounted on said support, cooperative driving gears mounted on'the distributor and the rotor, and a distributor cover mounted to completely enclose the open'end of the housing.

a frame casting formed to receive a rotor, an inductor coil mounted on the frame casting, a housing open at one end and at the bottom, said housing being fitted over the frame casting and enclosing the coil, a U-shaped magnet fitted over the housing and engaging the frame casting, a horizontal bearing seat formed on the frame casting,,'a distributor support mounted on said seat, a distributor rotatably mounted on said support, and a distributor cover mounted to completely enclose. the open end of the tatably supporting one end of the rotor, a cover member fitted to said casting and supporting the other end of the rotor, an inductor coil mounted on the frame casting, said casting being of nonmagnetic material and containing embedded therein pole pieces of. magnetic material, ahousing open at one end 'andat the bottom, said housing being fitted over theframe casting and enclosing the rotor, 'a U-shaped magnet fitted over the housing and engaging the frame casting, a

horizontal bearing seat formed onthe frame casting, a distributor support mounted for ad- .iustment on saidseat, a distributor rotatably mounted on said support a driving gear mounted on the rotor, and a gear carried with the distributor in mesh with said driving sear.

8. In an inductor magneto and in combination,

a frame casting formed to receive a rotor and ro-' tatably supporting one end of the rotor, a cover member fitted to said casting and supporting the other end of the rotor, an inductor coil mounted on the frame casting, said casting being of nonmagnetic material and containing embedded therein pole pieces of magnetic material, a housing open at one end and at the bottom, said housing beingfitted over the frame casting and-enclosing the rotor, a U-shaped magnet fitted over the housing and engaging the frame casting, a horizontal bearing seat formed on the frame casting, a distributor support mounted for'adjustment on saidrseat, a distributor rotatabLv mounted on said support, a driving gear mounted on the rotor, a gear carried with the distributor I in mesh with said driving gear, and a distributor ;'cover.mounted to completely enclose the open end of the housing.

9. In a magneto of the inductor type and in combination, a frame, a rotor mounted in said frame, an inductor coil mounted on said frame, a bearing seatformed on the frame, a carrier member adjustably mounted on said bearing seat, a distributor including a driving gear rotatably mounted on said carrier member, and a mating gear carried by the rotor.

' 10. In a magneto of the inductor type in combination, a frame, a rotor mounted in said an inductor coil mounted on said frame, 5. In an inductor magneto and in combination a seating flange formed aroundv the upper pordistributor including a driving gear rotatably. mounted on said carrier, a mating driving gear,

carried by the rotor, a housing open at theibottom andoneend fitted on the seating flange and covering the inductor coil and the distributor andthe carrier member, and a. distributor cover formed with a vertical seating flange fitted .against the open end of the housing and a hori 6. In an inductor magneto and in combines; :zontal seating flange fitted on the seating flange tion,--a frame casting formed to receive a rotor,'='-formed frame.

an inductor coil mounted on the frame casting, 1'1. In'amagneto of the inductor type and in ably mounted on said support, and a distributor cover mounted to completely enclose the open end of the housing. I

7. In an inductor magneto and in combination, a frame casting formed to receive a rotor and rocombination, aframe, a rotor mounted in said frame, laminated pole pieces carried by the frame 1 and extending laterally therethrough from adjacent the rotor to the outside surface of the frame,

an inductor coil mounted on said frame, a seating fiange formed around the upper portion of the frame, a bearing seat formed on the frame within said seating flange, a carrier member mountedon said bearing seat, a distributor including a driving gear rotatably mounted on said carrier, a mating driving gear carried by. the rotor, a housing open at the bottom and one end fitted on the seating flange and covering ductor coil and the distributor and the carrier member, a distributor cover formed with a vertical seating flange fitted against the open end of the housing, a horizontal seating flange fitted on the seating flange formed on the frame, and a U-shaped magnet fitted over the housing with its end portions in contact with the pole pieces extending through the frame.

12. In a magneto of the inductor type and in combination, a frame formed with a horizontal bore open at one end, a rotor mounted in said bore, a bearing formed in the frame at its closed end for said rotor, a closure member fitted over the open end of the bore, a bearing formed in said closure member for the rotor, an inductor coil mounted on the frame above said rotor, a bearing seat formed on the frame, acarrier member adjustably mounted on said bearing seat, a

distributor including a driving gear rotatably mounted on said carrier, and a mating driving gear carried by the rotor.

13. In a magneto oi the inductor type and in. combination, a frame formed with a horizontal bore open at one end, a rotor mounted in said bore, a bearing formed in the frame at its closed end for said rotor, a closure member fitted over the open end of the bore, a bearing formed in said closure member for the rotor, an inductor coil mounted on the frame above said rotor, a seating flange formed around the upper portion of the frame and the closure member, a bearing seat formed on the frame within said seating flange, a carrier member mounted on said bearing seat, a distributor including a driving gear rotatably mounted on said carrier, a mating driving gear carried by the rotor, a housing open at the bottom and one end fitted on the seating flange and covering the inductor coil and the distributor and the carrier member, and a distributor cover formed with a vertical seating flange fitted against the open end of the housing and a horizontal seating flange fitted on the seating flange formed on the closure member.

14. In a magneto of the inductor type and in combination, a frame formed with a horizontal bore open at one end, a rotor mounted in said bore, a bearing formed in the frame at its closed end for said rotor, a closure member fitted over the open end of the bore, a bearing formed in said closure member for the rotor at its end, pole pieces extending laterally through the frame from adjacent the rotor to the outside surface of the frame, an inductor coil mounted on the frame above said rotor, a seating flange formed around the upper portion of the frame and the closure member, a bearing seat formed on the frame within said seating flange, a carrier member mounted on said bearing seat, a distributor including a driving gear rotatably mounted on said carrier, a mating driving gear carried by the rotor, a housing open at the bottom and one end fitted 0n the seating flange and covering the inductor coil and the distributor and the carrier member, a distributor cover formed with a vertical seating flange fitted against the open end of the housing, a horizontal seating flange fitted on the seating flange formed on'the closure member, and a U-shaped magnet fitted over the hous-.

ing with its end portions in contact with the pole pieces extending through the frame.

15. In a magneto of the inductor type and in combination, a frame of non-magnetic material formed with a horizontal bore open at one end, a rotor mounted in said bore, a bearing formed in the frame at its closed end for said rotor, a

closure member fitted over the open end of the bore, a bearing formed in said closure member for the rotor, pole pieces embedded in the frame and extending laterally therethrough from adjacent the rotor to the outside surface of the frame, spaced laminated pole pieces embedded in the frame and extending upwardly therefrom, an inductor coil mounted between said pole pieces, a bearing seat formed on the frame, a carrier member mounted on said bearing seat, a distributor including a driving gear rotatably mounted on said carrier, and a mating driving gear carried by the rotor.

16. In a magneto of the inductor type and in combination, a frame of non-magnetic material formed with a horizontal bore open at one end, a rotor mounted in said bore, a bearing formed in the frame at its closed end for said rotor, a closure member fitted over the open end of the bore, a bearing formed in said closure member for the rotor, laminated pole pieces embedded in the frame and extending laterally therethrough from adjacent the rotor to the outside surface of the frame, spaced laminated pole pieces embedded in the frame and extending upwardly therefrom, an inductor coil mounted between said pole pieces, a seating flange formed around the upper portion of the frame and the closure member, a bearing seat formed on the frame within said seating flange, a carrier member mounted on said bearing seat, a distributor including a driving gear rotatably mounted on said carrier, a mating driving gear carried by the rotor, a housing open at the bottom and one end fitted on the seating flange and covering the inductor coil with its pole pieces and the distributor and the carrier member, and a distributor cover formed with a vertical seating flange fitted against the open end of the housing and a. horizontal seating flange fitted on the seating flange formed on the closure member.

17. 'In a magneto of the inductor type and in combination, a frame of non-magnetic material formed with a horizontal bore open at one end, a rotor mounted in said bore, a bearing formed in the frame at its closed end for said rotor, a closure member fitted over the open end of the bore, a bearing formed in said closure member for the rotor, laminated pole pieces embedded in the frame and extending laterally therethrough from adjacent the rotor to the outside surface of the frame, spaced laminated pole pieces embedded in the frame and extending upwardly therefrom, an inductor coil mounted between said pole pieces, a seating flange formed around the upper portion of the frame and the closure member, a bearing seat formed on the frame within said seating flange, a carrier member mounted on said bearing seat, a distributor including a driving gear rotatably mounted on said carrier, a mating driving gear carried by the rotor, a housing open at the bottom and one end fitted on the seating flange and covering the inductor coil with its pole pieces and the distributor and the carrier member, a distributor cover formed with a vertical seating flange fitted against the open end of the housing, a horizontal seating flange fitted on the seating flange formed on the closure member, and a U-shaped magnet fitted over the housing with its 'end portions in contact with the pole pieces extending through the frame.

18. A magneto of the inductor type comprising a frame of non-magnetic material formed with a horizontal bore open at one end, a rotor in said bore, the frame carrying a bearing. at one end for" the Irotor, a.closure member fitted over the open end of theframe and carrying a bearing f for-the rotor, laminated pole pieces embedded in the frame and extending laterally therethrough from adjacent the rotor to the outside of the frame, spacedlaminated pole pieces embedded in the frame and extending upwardly therefrom, an inductor coil mounted between said pole pieces. a seating flange formed around the upper portion of the frame casting in a horizontal plane, a bearing seat also formed on a horizontal Plane. a carrier member mounted on said bearing seat, a

distributor rotatably mounted on' said carrier member, a gear rigidly mounted with the disis a housing open at one end covering the inductor;

tributor plate, a mating gear on the rotor shaft.

1 coil and its pole pieces and fitted on the seating I flange formed on the frame, a U-magnet fitted f over said housing with its end portions, in con-J? tact "with the pole pieces extending through the frame casting, and a distributorcover formed a with a vertical seating flange and a horizontal l seating-flange, the verticalfiange fitting against the open endofthe housing and the horizontal 'flange fitting on the upper side of' the closure member for the frame casting.

19. A magneto of the inductor type comprising a frame casting of non-magnetic material formed with a horizontal bore open at one end, a rotor in said bore consisting of a shaft, non-magnetic material around said shaft and laminated magnetic material embedded therein, said material being in two sets of two sections each spaced axially from each other extendingcircumferentially around the periphery a distance less than 360 degrees the two sections of each set beingalso spaced circumferentially with respect to each other, the frame casting carrying a bearing at one end for the rotor shaft, a closure member fitted over the open end of the casting and carrying a bearing for the rotor shaft, laminated pole pieces embedded in the frame casting and extending laterally. therethrough from adjacent the rotor to the outside of the frame, spaced laminated pole pieces embedded in the frame casting and extending upwardly therefrom, an in-K' ductor coil mounted between, said pole pieces. a seating flange formed around the upper portion of the frame casting in a horizontal plane, a bearing seat also formed on a horizontal plane. a carrier member mounted on said bearing seat, a

distributor rotatably mounted on said carrierfitting against the open end of the housing and the horizontal flange fitting on the upper side of the closure member for the frame casting.

WILLIAM F. nonomn. enemies A. max. 

